CyberRota Analysis
AI-GeneratedThe vulnerability affects the Tor software prior to version 0.4.9.9, where an infinite loop can occur when decompressing a truncated zlib/gzip stream, leading to potential denial-of-service conditions. This issue arises from the mishandling of the Z_BUF_ERROR response, which causes the system to enter an endless retry loop. Users and administrators of Tor should prioritize this update to mitigate the risk of service interruptions.
Original NVD Description
tor before 0.4.9.9 was prone to an infinite loop when decompressing a truncated zlib/gzip stream with done=1. A truncated stream never reaches Z_STREAM_END, causing zlib to return Z_BUF_ERROR with no input remaining, which buf_add_compress() mistook for a full output buffer and retried forever. Fixed by returning TOR_COMPRESS_ERROR in that case so the caller can abort cleanly. This is TROVE-2026-021.
Related CVEs
Other vulnerabilities affecting the same vendor(s)